# Calmena vs Arc

The clearest difference is update cadence: Arc at every 3 days against Calmena's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Calmena sells 1 in-app purchase, starting at $17.99 per year and Arc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Calmena ships an update monthly, Arc every 3 days. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Calmena | Arc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/arc-gradual-exposure-help/id6759476138/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 24 MB | 38 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Techprog](https://appshunter.io/developer/1695141481) | [ZanaWorks LLC](https://appshunter.io/developer/1512608222) |

## What reviewers say

### Calmena

[App page](https://appshunter.io/ios/app/calmena/id6758100773)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 Year | $17.99 | per year |


### Arc

[App page](https://appshunter.io/ios/app/arc-gradual-exposure-help/id6759476138)

This app provides a structured and private way to practice exposure therapy for anxiety. It guides users through creating and following exposure ladders, logging attempts, and tracking progress. Advanced features offer deeper insights and therapist-ready summaries.

**Highlights:** Build and edit exposure ladders, Log and track anxiety attempts, Monitor anxiety levels and outcomes, View progress trends and milestones, Utilize practical support tools, Export and import data

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime | $14.99 | one-time |


## Frequently asked questions

### Is Calmena free?

Calmena is free to download, with in-app purchases available.

### Is Arc free?

Arc is free to download, with in-app purchases available.

### Do Calmena or Arc have ads?

Neither Calmena nor Arc shows ads.

### Which is updated more often, Calmena or Arc?

Calmena ships an update monthly, and Arc every 3 days. Most recently, Calmena was updated on November 9, 2026 and Arc on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*